111540252641 has 2 divisors, whose sum is σ = 111540252642. Its totient is φ = 111540252640.

The previous prime is 111540252613. The next prime is 111540252671. The reversal of 111540252641 is 146252045111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90709392400 + 20830860241 = 301180^2 + 144329^2 .

It is a cyclic number.

It is not a de Polignac number, because 111540252641 - 2¹⁴ = 111540236257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111540252598 and 111540252607.

It is not a weakly prime, because it can be changed into another prime (111540252671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55770126320 + 55770126321.

It is an arithmetic number, because the mean of its divisors is an integer number (55770126321).

Almost surely, 2^111540252641 is an apocalyptic number.

It is an amenable number.

111540252641 is a deficient number, since it is larger than the sum of its proper divisors (1).

111540252641 is an equidigital number, since it uses as much as digits as its factorization.

111540252641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 32.

Adding to 111540252641 its reverse (146252045111), we get a palindrome (257792297752).

The spelling of 111540252641 in words is "one hundred eleven billion, five hundred forty million, two hundred fifty-two thousand, six hundred forty-one".